Periodic Table of the Elements

atomic atomic
number weight alkali metals
alkaline earth metals
14 28.09
transition metals
1 1.01 Si symbol: black solid
blue liquid
other metals 2 4.003

H He
Silicon
red gas metalloids
Hydrogen
synthetically noble gases Helium
name prepared
3 6.94 4 9.01
most stable isotope halogens 5 10.81 6 12.01 7 14.01 8 15.999 9 18.998 10 20.18

Li Be grey synthetically prepared;

later found in trace
amounts in nature
other non-metals B C N O F Ne
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
unknown chemical properties
11 22.99 12 24.31 13 26.98 14 28.09 15 30.97 16 32.06 17 35.45 18 39.95

Na Mg
Sodium Magnesium
discovery claimed
Al
Aluminum
Si
Silicon
P
Phosphorus
S
Sulfur
Cl Ar
Chlorine Argon
19 39.10 20 40.08 21 44.96 22 47.90 23 50.94 24 51.996 25 54.94 26 55.85 27 58.93 28 58.69 29 63.55 30 65.41 31 69.72 32 72.64 33 74.92 34 78.96 35 79.90 36 83.80

K Ca Sc Ti
Potassium Calcium Scandium Titanium
V
Vanadium
Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
37 85.47 38 87.62 39 88.91 40 91.22 41 92.91 42 95.94 43 (98) 44 101.07 45 102.91 46 106.42 47 107.87 48 112.41 49 114.82 50 118.71 51 121.76 52 127.60 53 126.90 54 131.29

Rb Sr
Rubidium Strontium
Y
Yttrium
Zr Nb Mo Tc*** Ru Rh Pd Ag Cd In Sn Sb Te
Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium
I
Iodine
Xe
Xenon
55 132.91 56 137.33 57 138.91 72 178.49 73 180.95 74 183.84 75 186.21 76 190.23 77 192.22 78 195.08 79 196.97 80 200.59 81 204.38 82 207.2 83 208.98 84 (209) 85 (210) 86 (222)

Cs Ba La Hf Ta W Re Os
Cesium Barium Lanthanum Hafnium Tantalum Tungsten Rhenium Osmium
Ir
Iridium
Pt Au Hg TI Pb Bi Po At* Rn
Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
87 (223) 88 226.03 89 227.03 104 (261) 105 (262) 106 (266) 107 (264) 108 (277) 109 (268) 110 (281) 111 (272) 112 (285) 113 — 114 (298.19) 115 — 116 (293) 117 — 118 —

Fr Ra Ac Rf * Db* Sg* Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo

Francium Radium Actinium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium

58 140.12 59 140.91 60 144.24 61 (145) 62 150.36 63 151.96 64 157.25 65 158.93 66 162.50 67 164.93 68 167.26 69 168.93 70 173.04 71 174.97

Lanthanide series Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium
90 232.04 91 231.04 92 238.03 93 237.05 94 (244) 95 (243) 96 (247) 97 (247) 98 (251) 99 (252) 100 (257) 101 (258) 102 (259) 103 (262)

Actinide series Th Pa
Thorium Protactinium
U Np* Pu* Am** Cm* Bk* Cf * Es* Fm* Md* No* Lr*
Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium

* Discovered at Lawrence Berkeley National Laboratory

** Discovered in Chicago by Berkeley team
*** Discovered in Italy using a sample from Berkeley cyclotron bombardment
CSO26949